Build Thread - Speaker hole size | The Canadian Guitar Forum

Build Thread Speaker hole size

Discussion in 'Amp Building/Technical/Repair' started by MarkM, Mar 25, 2020.

  1. MarkM

    MarkM Gold Member

    Joined:
    May 22, 2019
    Location:
    Midnight Sun Estates
    I find myself with some time off work!

    I am building a speaker cabinet and need to know what size hole to cut in for a 12" speaker? I can not afford a speaker now but I have the wood and hardware.

    Thanks
     
  2. Lincoln

    Lincoln Gold Member

    Joined:
    Jun 2, 2008
    Location:
    Fort Saskatchewan, Alberta
    11" works for me. 11-1/8" if you want to push it to max.

    Thing is, you make it too large, you run out of structure to bolt to. 10-7/8" or 11" is good.
    10-3/4" if want to play it safe.
     
    greco likes this.
  3. dtsaudio

    dtsaudio Gold Member

    Joined:
    Apr 15, 2009
    Location:
    Hamilton, ON
    Take a look at the spec sheet for the speaker you want to use. It will tell you the baffle hole size.
    That said, under size it if in doubt. You can't make it smaller if you cut it too big.


    .
     
    Lincoln and laristotle like this.
  4. MarkM

    MarkM Gold Member

    Joined:
    May 22, 2019
    Location:
    Midnight Sun Estates
    Want to put a Celistion Greenback in
     
  5. _Knighthawk_

    _Knighthawk_ Gold Member

    Joined:
    Mar 2, 2014
    Location:
    Burlington
    Celestion G12M Greenback

    Mounting Information
    Cut-out diameter
    11.1", 283mm
    Diameter
    12.2", 309mm
    Magnet structure diameter
    5.9", 150mm
    Mounting slot dimensions
    0.31", 7.9mm Ø
    Mounting slot PCD
    11.7", 297mm
     
  6. MarkM

    MarkM Gold Member

    Joined:
    May 22, 2019
    Location:
    Midnight Sun Estates
    Thanks folks!
     
  7. loudtubeamps

    loudtubeamps

    Joined:
    Feb 2, 2012
    Location:
    North shore :Prince Edward Island
    Are you going to mount the speaker to the back or front of the baffle? I would go 11" ... if you decide on a front mount, you may have to bevel the leading edge of the cutout.
     
  8. MarkM

    MarkM Gold Member

    Joined:
    May 22, 2019
    Location:
    Midnight Sun Estates
    Is there an advantage to either mount?
     
  9. jb welder

    jb welder

    Joined:
    Sep 13, 2010
    Location:
    Melonville, Canada
    Front mount is a lot easier to do swaps (unless it's open back).
    That's just one thing. I'm sure there are pros & cons to both methods, hopefully we'll hear about some. :)
     
  10. loudtubeamps

    loudtubeamps

    Joined:
    Feb 2, 2012
    Location:
    North shore :Prince Edward Island
    pretty simple really.... your design of the grille cloth install will determine the way the speaker will be mounted.
    No real advantage sonically speaking. Be sure you have enough distance between the grill cloth and speaker cone to afford the speaker some protection from a frontal attack![​IMG]
     
    MarkM likes this.

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